Using the :: notation is not a "use hack" by itself. This is used, quite properly, to have modules be in catergories, e.g. XML::Parser, IO::Socket, etc.

What I was referring to was taking advantage of this notation to load a module based on its location, instead of based on its name. The way to do this task in a way which does not have cavaets is to modify @INC (e.g. using lib) so you can load the module in question using its real name. Even if this approach did work, I find it to be bad style -- a use line should tell you what module you are using, it should not be something that needs to be modified when you just move files around.